* java/net/Socket.java (Socket (SocketImpl)): Don't allow null

	* java/net/Socket.java (Socket (SocketImpl)): Don't allow null
	SocketImpl. Update Javadoc.
	(bind): Call close() not impl.close() in event of exception.
	(connect): Likewise.
	Remove superfluous null checks throughout.
	* java/net/ServerSocket.java (ServerSocket (int, int, InetAddress)):
	Don't create an extra socket. Fix for PR libgcj/10868.
	(bind): Clean up exception handling.
	Remove superfluous null checks throughout.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@70219 138bc75d-0d04-0410-961f-82ee72b054a4